A magnetic sensor comprising: an application specific integrated circuit (ASIC); an insulating protective film formed on a surface of the ASIC; a substrate film formed on the insulating protective film; and a magnetic field detection element formed on the substrate film, the magnetic field detection element including two magnetic wires on the substrate film, a detection coil surrounding the two magnetic wires, two electrodes coupled to the two magnetic wires for wire energization, and two electrodes coupled to the coil for coil voltage detection.